The change primarily reflects lower than forecasted potash sales volumes
late in the quarter as buyers continued to defer significant purchases
amidst near-term market uncertainty.

Additional discussion around third-quarter results, as well as full-year
guidance will be addressed in our third-quarter news release and
conference call on October 24, 2013.

Notes:

1.

All references to per-share amounts pertain to diluted net income per
share.

PotashCorp is the world's largest crop nutrient company and plays an
integral role in global food production. The company produces the three
essential nutrients required to help farmers grow healthier, more
abundant crops. With global population rising and diets improving in
developing countries, these nutrients offer a responsible and practical
solution to meeting the long-term demand for food. PotashCorp is the
largest producer, by capacity, of potash and third largest producer of
nitrogen and phosphate. While agriculture is its primary market, the
company also produces products for animal nutrition and industrial
uses. Common shares of Potash Corporation of Saskatchewan Inc. are
listed on the Toronto Stock Exchange and the New York Stock Exchange.

This release contains forward-looking statements or forward-looking
information (forward-looking statements). These statements can be
identified by expressions of belief, expectation or intention, as well
as those statements that are not historical fact. These statements are
based on certain factors and assumptions including with respect to:
foreign exchange rates, expected growth, results of operations,
performance, business prospects and opportunities and effective tax
rates. While the company considers these factors and assumptions to be
reasonable based on information currently available, they may prove to
be incorrect. Several factors could cause actual results or events to
differ materially from those expressed in the forward-looking
statements, including, but not limited to the following: variations
from our assumptions with respect to foreign exchange rates, expected
growth, results of operations, performance, business prospects and
opportunities, and effective tax rates; fluctuations in supply and
demand in the fertilizer, sulfur, transportation and petrochemical
markets; costs and availability of transportation and distribution for
our raw materials and products, including railcars and ocean freight;
changes in competitive pressures, including pricing pressures; adverse
or uncertain economic conditions and changes in credit and financial
markets; the results of sales contract negotiations within major
markets; economic and political uncertainty around the world; timing
and impact of capital expenditures; risks associated with natural gas
and other hedging activities; changes in capital markets; unexpected or
adverse weather conditions; changes in currency and exchange rates;
unexpected geological or environmental conditions, including water
inflows; imprecision in reserve estimates; adverse developments in new
and pending legal proceedings or government investigations;
acquisitions we may undertake; strikes or other forms of work stoppage
or slowdowns; rates of return on and the risks associated with our
investments; changes in, and the effects of, government policies and
regulations; security risks related to our information technology
systems; and earnings and the decisions of taxing authorities, which
could affect our effective tax rates. Additional risks and
uncertainties can be found in our Form 10-K for the fiscal year ended
December 31, 2012 under the captions "Forward-Looking Statements" and
"Item 1A - Risk Factors" and in our other filings with the US
Securities and Exchange Commission and the Canadian provincial
securities commissions. Forward-looking statements are given only as at
the date of this release and the company disclaims any obligation to
update or revise the forward-looking statements, whether as a result of
new information, future events or otherwise, except as required by law.